On the next page, you'll need to enter your Incoming and Outgoing settings.

Server — This is your DreamHost mail server name. The example above uses 'imap.dreamhost.com' for the incoming server. If you'd prefer a POP connection, you would use pop.dreamhost.com instead. The outgoing server is always 'smtp.dreamhost.com'.

Make sure you only enter your DreamHost mail servername. Do not use a subdomain such as mail.example.com. You may get an insecure warning if you use the wrong mail hostname.